Rearrange a string java If no such arrangement is possible, print -1. It returns an empty string if such an arrangement is not possible. com Oct 3, 2025 · Learn brute force and optimized approaches to rearrange strings so no identical characters are adjacent. Better than official and forum solutions. May 26, 2023 · This post will show you how to sort a String in Java in 4 different ways. Mar 18, 2024 · The string class doesn't have any method that directly sorts a string, but we can sort a string by applying other methods one after another. Example: Here, we will split a String having multiple delimiters or regex into an array of Strings. Mar 19, 2023 · Then rearrange the string, it becomes "abba". stream (arrayOfStrings) creates a stream of strings from the array. The result is zero if the strings are equal; compareTo returns 0 exactly when the equals (Object) method would return true. String s = "edcba" -> "abcde" Jun 13, 2020 · I'm trying to rearrange the characters of a string so that the first character comes after the next two characters following after it, i. Jan 18, 2024 · Sometimes, we need to check all the possible permutations of a String value, often for mind-boggling online coding exercises and less often for day-to-day work tasks. Using Arrays. For example: Van-Dame Claud Result: Claud Dame-Van I created this method, but it seems that is not correct, any suggestion or maybe a Jul 11, 2025 · There is no predefined method in String Class to replace a specific character in a String, as of now. If at most one character has odd count then the string can be a palindrome else it's not. It is the most direct and common method to sort an array in lexicographical order with case-insensitive. Aug 19, 2014 · Given a non-empty string str and an integer k, rearrange the string such that the same characters are at least distance k from each other. You can do it by converting the string to char array and use methods of Arrays class in java. b Jul 15, 2025 · Given a string and a list of indices, the task is to rearrange the characters of the string based on the given indices. Additionally, we’ll be expanding our examples to explore several different scenarios, including sorting lists based What is the easiest way to shuffle the letters of a word which is in an array? I have some words in an array and I choose randomly a word but I also want to shuffle the letters of it. Searching for a Character in a String 1. But whenever i am running this it' entering in an infinite loop. In this article we would go through some methods to swap character of a given String and get a new String (with swapped characters) while Nov 11, 2025 · In Java, the StringBuilder class (part of the java. Mar 31, 2025 · In Java programming, string manipulation is a crucial skill that every developer should master. Jul 20, 2022 · Given a binary string s and two integers x and y are given. Learn how to convert a string to a character array, sort it, and convert it back to a string. I have created a utility class StringAlignUtils. Lets look at an example string of '"abcdef"'. Find optimized Python, Java, C++, JavaScript, and C# solutions with detailed explanations and implementation notes. Oct 8, 2015 · I ask users to enter one phrase (completely random) and then I ask them to enter another phrase that is three words and all the words are together. The best method to use depends on the specific requirements of your program. All input strings are given in lowercase letters. May 13, 2024 · This is where the concept of sorting a string comes in. Another useful class in the java. The frequency of a character is the number of times it appears in the string. In this post, I'll show you how to arrange sentences in ascending order. a) If an alphabet comes increment its occurrence count into a hash_table. The String class in Java is provided as a part of the Java standard library and offers various methods to perform operations on strings. You are given two 0-indexed strings s and target. The sorted () operation is then applied to the stream, which sorts the elements in their natural order (lexicographical order for strings). Contribute to Asad-noor/geeksforgeeks development by creating an account on GitHub. Count odd occurrences. Reorganize String (LeetCode 767) | Full solution with scenario breakdown for easy explanation Nikhil Lohia 80. Java has inbuilt methods to sort a string in any order, increasing or decreasing. If the rearrangement is possible then return the rearranged string as output and if no such rearrangement is possible then return an empty string or a prompt message that no such string is possible. Also I want to have word one and three capatilized. java, which wraps all the logic inside it, and provide you convenient methods which you can call directly. example: Input=I love my country India Output=country India lo Jul 28, 2023 · In this problem, we need to remove the minimum characters from the string and rearrange the remaining characters to make the string palindromic. The other shift would produce '"cdef"'. Arrange String in Alphabetical order java Computer Class 10 ICSE ISC Java Programming Class 10 ICSE ISC Java Programming ICSE Computer Applications by Prateik Sharma Registration form : https Sorting a string alphabetically means rearranging its characters in order, from A to Z. 1. Java Program to Sort Strings in Alphabetical Order using a for loop In this example, we used the for loop to iterate the string array from start to end and compare each word with another. oracle. We used the temp variable to move their places based on the result. Scanner inp 1. g. Explanation 2: change "d" to "b" => "aabcb" => "abcba". Apr 28, 2017 · Shifting a set of letters can be interpreted in two ways that I know of. The program defines a regex pattern to match digits (\\d+) and a replacement string ("number"). Return the May 21, 2025 · Java exercises and solution: Write a Java program to rearrange a string so that the same characters are positioned a distance away. To generate all permutations, we first sort the string and then one by one generate lexicographically next permutation. sort () method that comes under java. Can you solve this real interview question? Reorganize String - Given a string s, rearrange the characters of s so that any two adjacent characters are not the same. Jul 23, 2025 · In this article, we will learn how to shuffle characters in a String by using Java programming. Examples: Input : AC2BEW3 Output : ABCEW5 Alphabets in the lexicographic order followed by the sum of integers(2 and 3). Jul 23, 2025 · It implements the Enumeration interface. For this, we have taken a String value as input and the method is available in java. we cannot perform any changes once its created). Array rearrangement can serve various purposes, such as sorting the elements, reversing the order, or positioning specific elements in desired locations. # Given a string, construct a new string by rearranging the original string and deleting characters as needed. Nov 17, 2016 · I want to sort a String that has nr. Nov 7, 2021 · This blog will cover the different approaches to the problem of rearranging strings with an explanation and its C++ code. Jul 23, 2025 · In Java, sorting an array in lexicographical (dictionary) order means elements will be arranged based on their alphabetical order from A to Z with case sensitivity. Java exercises and solution: Write a Java program to rearrange a string so that all same characters become d distance away. This method leverages the functional Jul 23, 2025 · The simplest approach to solve this problem is to iterate a loop over the range [0, N – 1], where N denotes the length of the string, using the variable i and print the value of str [i]. util package is the Collections class, which include the sort() method for sorting lists alphabetically or numerically. Uni Name, Subject, Location 2 I can do the operation by this way int i Jun 14, 2016 · String str1 = "11,22,13,31,21,12"; String str2 = "11,12,13,21,22,31"; Is there a simple clean way to modify str1 to get str2? All the problem solutions of geeksforgeeks site. [An Editor is available at the bottom of the page to write and execute the scripts. To solve the problem, the first question we should ask ourselves is when we can make string palindromic. Different ways to sort a String Alphabetically There are two ways to do this in Java using different Aug 7, 2021 · I'm trying to rearrange words in any given string (20 words or less). Any method which seems to modify it always returns a new string object with modification. This is the lexicographically smallest string. public class Palindrome { //count Oct 20, 2016 · Requirement: Write a program to accept a string and print the words in descending > order of their length, without using arrays. In Reorganize String problem we have given a string containing some characters “a-z” only. When talking about alphabetical order, we generally refer to the lexicographical (dictionary) order, where the order is based on the value of the string characters. The string is a sequence of characters. Jul 23, 2025 · The above Java program demonstrates replacing a string using replaceAll() and a regex pattern. May 11, 2023 · Learn how to sort strings alphabetically in Java with step-by-step instructions and examples for efficient implementation. The latter is done by deleting the first two characters, so I would guess Jul 1, 2017 · What is your purpose for avoiding arrays? Using a mutable data structure like an array or a List is the intended way to do operations like sorting. Given : x or y can not be 0 Examples: Sep 15, 2020 · In this article, we are going to see how we can use a heap data structure to rearrange a string so that no two adjacent characters are the same. Discover the best methods to rearrange an ArrayList in Java with expert insights and code snippets for effective implementation. In this tutorial, we will explore how to sort strings in ascending or descending order using Java. Intuitions, example walk through, and complexity analysis. CASE_INSENSITIVE_ORDER to sort an array in lexicographical order. Approach: cnt [a] be the no. I'm having this issue because I can not get the last word in the string to print. This is the code: /* * To change this license header, choose License He Jul 23, 2025 · Efficient String manipulation is very important in Java programming especially when working with text-based data. Aug 5, 2011 · 25 String is an immutable class in java. Jan 19, 2021 · In this tutorial, we will learn how to sort String. How do you arrange a string in alphabetical order in java? | String in JavaHow to sort a string in alphabetical order in java?Sort a string in alphabetical Apr 22, 2016 · For a string, count the number of occurences of each character. Reorganize String - Given a string s, rearrange the characters of s so that any two adjacent characters are not the same. In this article, we will explore essential methods like indexOf (), contains (), and startsWith () to search characters and substrings within strings in Java. The result is a positive integer if this String object lexicographically follows the argument string. util package and this method takes a list as input. In many cases, there is a need to add a new line to a string to format the output. sort() method with String. For instance, the words ‘bat’ and ‘tab’ represents two distinct permutation (or arrangements) of a similar three letter word. Java has several ways to rearrange the characters inside the string in a particular order; many of them require it to be converted into an array of characters, like the Arrays. split(String regex) function splits string around matches of the given regular expression regex, for finding a pattern to be matched with the given pattern. We can also sort the array using Bubble sort. First, we’ll start with the Collections class and then use the Comparator interface. Strings - Special Characters Because strings must be written within quotes, Java will misunderstand this string, and generate an error: May 21, 2025 · This resource offers a total of 560 Java String problems for practice. How can I sort this list alphabetically? Jul 7, 2025 · The provided Java code defines a method to rearrange characters of a given string so that no two adjacent characters are the same. Example: Input : PYTHON Output : HNOPTY Input : Geeks Output : eeGks Naive Method to sort letters of string alphabetically Here we are converting the string into list and then finally sorting the entire list alphabet wise. I was wondering whether there's a shortcut to change the order of method parameters as easily, so that I am trying a practice problem on Coderbyte. , no two adjacent characters can be alphabets or digits. In Java, there is not a single method inside the String class for sorting purposes. My approach to this was creating a HashMap and placing each character of the string in it. Can you solve this real interview question? Can Make Palindrome from Substring - You are given a string s and array queries where queries[i] = [lefti, righti, ki]. length <= 500 * s consists of lowercase English letters. This function iterates through a String and checks the length of every word in the string and arranges them based on their length. Then we can in-place generate all permutations of the given string using backtracking by swapping each of the remaining characters in the string with its first character and then generating all the permutations of the remaining characters using a Nov 28, 2015 · I'm trying to sort the digits of an integer of any length in ascending order without using Strings, arrays or recursion. Examples: Input: str = "geeks2020" Output: g2e0e2k0s Input: str = "IPL20" Output: I2P0L Mar 1, 2019 · Arrange characters of a string based on number of occurrences and maintain insertion order if the element is not repeated Sep 14, 2025 · Since the string is immutable in Java, the idea is to convert the string into a character array. It then uses replaceAll() to replace all occurrences of digits in the input string with the replacement May 11, 2024 · In Java, there are several ways to iterate over the characters of a string, each with its own time and space complexity. This is in such a way that it will become equal to another given string. Solutions Java C++ Jul 12, 2025 · Given a string str with repeated characters, the task is to rearrange the characters in a string such that no two adjacent characters are the same. com called "alphabet Soup" that asks you to write Java code to rearrange a String in alphabetical order. i cant figure out what is exactly happeni Oct 10, 2019 · Java does not have a direct method to sort a string. Apr 2, 2009 · I have a List<String> object that contains country names. if the string is "abc", the rearrangement would be "bca". Includes Python, C++, and Java code examples. Reorganize String. util. In order for a set of characters to be able to produce a palindrome, only one of the letters can be repeated an odd number of times, so you can first weed that out. Mar 13, 2025 · A quick example and explanation of the split() API of the standard String class in Java. This the characters wrap around. May 21, 2025 · Java exercises and solution: Write a Java program to rearrange a string so that the same characters are positioned a distance away. For example, a String “abc” will have six different ways to arrange the characters inside: “abc”, “acb”, “cab”, “bac”, “bca”, “cba”. length <= 500 s consists of lowercase English letters. May 11, 2024 · String formatting and generating text output often comes up during programming. May 31, 2015 · I cannot figure out how to change the order of a given name. Jul 23, 2025 · Rearranging the order of characters, in a string can be done by shuffling them. Jul 2, 2025 · JavaScript exercises, practice and solution: Write a JavaScript program to check whether it is possible to rearrange the characters of a given string. Contribute to HarshitaMathpal/GFG-Java development by creating an account on GitHub. A delimiter is a character or set of characters that separate tokens in the string. Jun 18, 2024 · Sort a String in Java | 2 Different Ways In this video, we will explore two different methods to sort a string in Java. Return the maximum number of copies of target that can be formed by taking letters from s and rearranging them. For example, if the string is "code" and the indices are [3, 1, 0, 2], the rearranged string should be "edoc". For example characters of "geeksogeeks" can be rearranged to form a palindrome "geeksoskeeg", but characters of "geeksforgeeks" cannot be rearranged to form a palindrome. sort method. Methods to shuffle characters in a String 1. Strings, being one of the most commonly used data types, often require various operations such as reversing, finding substrings, concatenation, and more. For example, the string "java" becomes "aajv" after sorting. lang package) provides a mutable sequence of characters. After generating a permutation, check if the generated permutation is the same as the given string and return Im trying to make a program to take input for a string from the scanner, but i want to break up the string that was inputed and reverse the order of words. Can you solve this real interview question? Rearrange Characters to Make Target String - You are given two 0-indexed strings s and target. sort() function. ] 1. In this article, we will explore different ways to sort an array of strings lexicographically in Java using Arrays. Arrays class. If the HashMap contains an even sum of all the values, we must make sure each value itself is even. Without writing actual code for you, here is the algorithm I would use: Create a map of characters to a counter. util package to sort Sort a String in alphabetically / ascending order Convert a string str to char array by using Dec 8, 2022 · Given a string str, the task is to print all the permutations of str. Oct 3, 2025 · Using backward traversal – O (n) Time and O (n) Space The idea is to start at the last character of the string and move backward, appending each character to a new string res. Below is the implementation of the above approach: Nov 16, 2013 · 1 tried spliting with $ but it is not working in Java, for an instance str of String, str. Note: StringTokenizer is a legacy class, and the split() method is preferred for modern applications. Jul 23, 2025 · Given a string s and a positive integer d, rearrange the characters of the string so that any two identical characters are at least d positions apart. Jul 23, 2021 · Given a sorted string S consisting of N lowercase characters, the task is to rearrange characters in the given string such that no two adjacent characters are the same. This could be left shift by two to produce the string '"cdefab"'. One of the most typical interview questions in Java is to sort a string in ascending order. Could smb please explaing the process of sorting characters of String alphabetically? For example, if I have String "hello" the output should be "ehllo" but my code is doing it wrong. For example, you can find the length of a string with the length() method: Apr 3, 2025 · In this tutorial, we’ll explore various ways of sorting a list alphabetically in Java. 6K subscribers Subscribed Jul 23, 2025 · Given a string containing uppercase alphabets and integer digits (from 0 to 9), the task is to print the alphabets in the order followed by the sum of digits. Example 1: Input: s = "aab" Output: "aba" Example 2: Input: s = "aaab" Output: "" Constraints: * 1 <= s. Implementation of the above approach: Jul 23, 2025 · One common operation we may need to perform on arrays is rearranging their elements. This method returns a string array containing the required substring. If it is possible then print Yes else print No. Sorting strings is a common task in many applications, from data processing to creating ordered lists. sort () and sorted () methods. In the main function, aString array is defined and its length is assigned to a variable. We’ll also use List’s API to sort alphabetically followed by the streams and finally use TreeSet. Although the shuffle () method provided by Java's Collections class is handy there are situations where you might require approaches. sort(), Arrays. The ‘sort_elements’ function is called on this string and the sorted array is displayed on the console. Nov 30, 2023 · To sort a String in Java, use the “sort()” method with default and custom parameters, “Java 8 Streams API”, “reverseOrder()”, or define a custom method. Possible to do int[] counts = new int[26]; Go through each character in the input string, and increment the count In this video, we tackle a common coding interview question: Given a string s, rearrange the characters so that all vowels appear at the beginning while keeping their original order. Apr 12, 2023 · Auxiliary Space: O (n) Approach: The approach is to create a vector of integers representing the original indices of the strings, sort the vector of indices based on the strings using a lambda function that compares the corresponding strings, and then print the sorted vector of indices. Feb 6, 2023 · Given alphanumeric string str, the task is to rearrange the string such that no two adjacent characters are of the same type, i. This new string res will contain the characters of the original string in reverse order. Feb 17, 2025 · Given a string s with lowercase repeated characters, the task is to rearrange characters in a string so that no two adjacent characters are the same. of occurrences of the character a. May 13, 2025 · Java programming exercises and solution: Write a Java program to rearrange the alphabets in the order followed by the sum of digits in a given string containing uppercase alphabets and integer digits (from 0 to 9). util package. Learn how to sort strings alphabetically in Java with practical examples and best practices. If no such arrangement is possible, print "Cannot be rearranged". A permutation is an arrangement of all or part of a set of objects, with regard to the order of the arrangement. Java Sort a List In the previous chapters, you learned how to use two popular lists in Java: ArrayList and LinkedList, which are found in the java. Sort(); Thanks in Advance. Apr 25, 2023 · Given a string of letters, write a python program to sort the given string in an alphabetical order. Using indexOf(char c) The indexOf() searchesfor the first occurrence of a Oct 11, 2023 · In this example, we will learn to align a string to left ,right or center. sort () Method In this example, we will use the Arrays. It starts with an input string containing numbers. I tried modifying the loop range, but I am no Sorting string array according to lexicographic order with a custom ordering (a permutation of abcdefghijklmnopqrstuvwxyz). If it is not possible to do so, then print empty string (""). This is what i have so far. Jul 23, 2025 · Given a string, Check if the characters of the given string can be rearranged to form a palindrome. If this count is greater than 1 or is equal to 1 and May 27, 2017 · The result is a negative integer if this String object lexicographically precedes the argument string. This is equivalent to shifting bytes where information is lost. To perform Java String Tokenization, we need to specify an input string and a set of delimiters. Consider odd values of cnt [a], then a palindrome can not contain more than one character a with cnt [a]. Jul 23, 2025 · The String split () method in Java is used to split a string into an array of substrings based on matches of the given regular expression or specified delimiter. I have it so it splits at the semicolon comma and space. Dec 24, 2020 · 0 I am working on a problem from codesignal, which asks to determine whether the characters of a string can be rearranged to make a palindrome. How do I do that? Lets say my integers are Class2 "3" "4" "1" in main I do class2. sort(string). Example 1: Input: s = "aab" Output: "aba" Example 2: Input: s = "aaab" Output: "" Constraints: 1 <= s. Jul 23, 2025 · Given a string and a positive integer d, rearrange characters of the given string such that the same characters become at-least d distance away from each other. And the goal of the program is to print out phrase one but to have the position of third word in the second phrase at position one. sort (), Collections. Example: We will use Arrays. sort (), and custom comparators for case-insensitive and reverse order sorting. It is a widely used data type for storing and manipulating textual data. Jan 5, 2018 · Given a string s, rearrange the characters of s so that any two adjacent characters are not the same. Explore the various methods to sort strings in Java, including using the Arrays. In-depth solution and explanation for LeetCode 767. public stati Jul 23, 2025 · [Naive Approach] Generating all permutations One simple solution is to generate all the permutations in lexicographic order and store the rank of the current string. See full list on docs. For example, if it was String s = "Stack,over,flow"; How can I change the position of flow with stack or stack with over? Sep 3, 2024 · The task is to rearrange characters in a string such that no two adjacent characters are the same. Print the Sorted Names in an Alphabetical Order. Jul 12, 2025 · Java 8 Streams to sort an array of strings In this method, the Arrays. Subject, Uni Name, Location 2 I want to re-order the format like this one Number. Get Character at Index Write a Java program to get the character at the given index within the string. Strings are fundamental to Java programming and find extensive usage in various applications, such as user input Given a string s, rearrange the characters of s so that any two adjacent characters are not the same. It includes 112 main exercises, each accompanied by solutions, detailed explanations, and four related problems. Our task is to rearrange those characters such that no two same characters are adjacent to each other. Sep 19, 2013 · I have a string like this format Number. sort() and custom sort() method using simple arrays and swapping example. The input order is firstName middleName, lastName, emailAddress and Jul 23, 2025 · Steps Using CompareTo () method compare one string with the rest of the strings To swap the elements based on the comparison between the two string. public stati Is there a native way to sort a String by its contents in java? E. Apr 30, 2024 · Rearrange Characters to Make Target String in Java. Nov 8, 2016 · So my goal is to rearrange a string that is inputted into the program so that it outputs the same info but in a different order. Toggle Example Explanation for Reorganize String Algorithm for Reorganize String Implementation in C++ Implementation in Java Complexity Analysis for Reorganize String Time Complexity Space Complexity Jul 23, 2025 · Given a string S containing lowercase English alphabets, and a matrix shift [] [] consisting of pairs of the form {direction, amount}, where the direction can be 0 (for left shift) or 1 (for right shift) and the amount is the number of indices by which the string S is required to be shifted. Upvoting indicates when questions and answers are useful. We may rearrange the substring s[leftirighti] for each query and then choose up to ki of them to replace with any lowercase English letter. #Sample Case (s): # 1) Input Output # s='baccc' 'ccbca' # t=2 # 1) Input Output # s='zzzazz Jul 23, 2025 · Your All-in-One Learning Portal: GeeksforGeeks is a comprehensive educational platform that empowers learners across domains-spanning computer science and programming, school education, upskilling, commerce, software tools, competitive exams, and more. Example: Sorting strings alphabetically is a common task in programming, often used in search engines, dictionaries, and data organization. Task is to arrange the given string in such a way so that '0' comes X-time then '1' comes Y-time and so on until one of the '0' or '1' is finished. , ascending order. The interviewer may request that you sort the text in ascending order without utilizing any built-in Java methods. I'll start by separating all of the words from the phrase, then compare their lengths and rank them by word length. Then concatenate rest of the string and print the final string. 1- Start traversing the given string. What's reputation and how do I get it? Instead, you can save this post to reference later. Examples: Input: str = "cd" Output: cd dc Input: str = "abb" Output: abb abb Feb 12, 2016 · In IntelliJ I can easily rearrange the order of statements (or whole methods for that part) by pressing ⌘ + Shift + ↑ (or ⌘ + Shift + ↓). This tutorial is perfect for students, professionals, or anyone interested in enhancing their Java programming skills by learning how to sort strings efficiently. Nov 21, 2022 · Given a string, convert the string to palindrome without any modifications like adding a character, removing a character, replacing a character etc. Using a Fisher Mar 20, 2011 · I want to sort a string "computer" -> "cemoprtu", but without using Arrays. So the easy solution is that we can use the Array. Return the alphabetically largest string # that can be constructed respecting a limit as to how many consecutive characters can be the same. Master recursive string traversal techniques in Java, explore advanced patterns, and learn practical solutions for efficient string manipulation and algorithm design. I have my code below but it was marked as incorrect. Sep 17, 2013 · I want to rearrange a name being put in lastname:firstname,middlename so that the o/p is first middle and last. One interesting problem that frequently comes up in Java tutorials and coding challenges is how to move all special characters in a string to the Oct 16, 2024 · As we know that Object of String in Java are immutable (i. This method uses a highly optimized A String in Java is actually an object, which means it contains methods that can perform certain operations on strings. Aug 8, 2018 · You'll need to complete a few actions and gain 15 reputation points before being able to upvote. 0 How about putting the Strings in a List and call the sort() method? The Java String class implements the 'Comparable' interface and thus already has the compareTo() method, which should compare the strings in order. Why Sort Mar 24, 2013 · i'm just trying to write a code for arranging the words within a string alphabetically. It will use loops, by converting the String to an Array, by using a comparator and by using Stream. Mar 17, 2024 · Have a look at different ways to sort a String alphabetically in Java. Finally, the forEach method is used to print each element of the sorted stream. Maybe split() the string, then access the individual words and reassemble them in the form you like it. Jul 11, 2023 · Learn to sort a string alphabetically using Stream. A set of characters can form a palindrome if at most one character occurs an odd number of times and all characters occur an Learn how to solve the LeetCode problem 767. Sample Output Apr 28, 2025 · In Java, a string is an object that represents a sequence of characters. If the substring is possible to be a palindrome string after the operations above, the Sort Characters By Frequency - Given a string s, sort it in decreasing order based on the frequency of the characters. A couple of well-defined algorithms can help us create all the Jul 23, 2025 · Here, we will sort the array in ascending order to arrange elements from smallest to largest, i. Reorganize String in Python, Java, C++ and more. If you want to manipulate a string, consider StringBuilder or StringBuffer in case you require thread safety. Examples: Input : "mdaam" Output : "madam" or "amdma" Input : "abb" Output : "bab" Input : "geeksforgeeks" Output : "No Palindrome" Count occurrences of all characters. You can take some letters from s and rearrange them to form new strings. Mar 19, 2019 · Rearrange a string: This is an interview problem, a bit similar to the run-length coding problem. To do modifications on string stored in a String object, we copy it to a character array, StringBuffer, etc and do modifications on the copy object. Let’s discuss how to use newline characters. e. In this article, we will explore techniques, for shuffling characters in a string without using the shuffle () method. Return any possible rearrangement of s or return "" if not possible. This tutorial will ensure modern practices. Note: The string has only lowercase English alphabets and it can have multiple solutions. Aug 23, 2023 · In this article, we tackled problem 767, “Reorganize String,” by devising a strategy to rearrange characters in the string while ensuring that no two adjacent characters are the same. . Apr 3, 2011 · I was wondering how I can rearrange the contents within a string. Unlike the String class (which is immutable), StringBuilder allows modification of character sequences without creating new objects, making it memory-efficient and faster for frequent string operations. It has been featured in Facebook interview. However, this can be achieved indirectly by constructing a new String with 2 different substrings, one from the beginning till the specific index - 1, the new character at the specific index, and the other from the index + 1 till the end. May 2, 2025 · Naive Approach - O (n Log n) Time A simple approach is to use sorting algorithms like quick sort or merge sort and sort the input string and print it. What is String Sorting? String sorting is the process of arranging strings in a specific order, typically in alphabetical order. qpb eqncdles pdgevcle nevy omf bomj omiv isxns abq bofcu dkuju pbeu mlozb eqmso nfmzs